Non-iridescent glass structures
OwnerRoy G. Gordoninventor
Life of this patent
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Abstract
This disclosure describes transparent glass window structures of the type bearing a coating of infra-red reflective material which is advantageously less than about 0.85 microns in thickness and wherein the observance of iridescence resulting from such a reflective coating is markedly reduced by provision of a very thin coating system beneath said infra-red reflective coating. The thin coating system forms means to reflect and refract light to interfere with the observation of iridescence. A particular advantage of the invention is the ability of the thin coating system to be coated in a fraction of time presently required to coat anti-iridescent interlayers of the prior art.
Claims11
In a non-iridescent, transparent, sheet structure of the type comprising
- (A) a transparent substrate,
- (B) an infra-red reflective coating and
- (C) an iridescence-suppressing interlayer means between
- said substrate and infra-red-reflective coating, the improvement whereby said structure comprises, between said infra-red-reflective coating and said transparent substrate, an interlayer comprising
- (1) a first interlayer component of relatively high refractive index material, nearer to said substrate;
- (2) over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and
- (3) the combined interlayer components for said iridescence-suppressing means having a total optical thickness of about 1/6th of a 500 nanometer design wavelength.
In a non-iridescent, transparent, sheet structure of the type comprising
- (A) a transparent substrate;
- (B) an electrically conductive coating and
- (C) an iridescence-suppressing interlayer means between said substrate and electrically conductive coating, the improvement whereby said structure comprises, between said conductive coating and said transparent substrate, an interlayer comprising
- (1) a first interlayer component of relatively high refractive index material, nearer to said substrate;
- (2) over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and
- (3) the combined interlayer components for said iridescence-suppressing means having a total optical thickness of about 1/6th of a 500 nanometer design wavelength.
Dependencies are inferred from the claim text.